\begin{tikzpicture}
    \begin{scope}
        \tkzDefPoints{0/0/A, 2/0/B, 1.5/1.3/C}
        \tkzDrawPolygon(A,B,C)
        \tkzLabelPoints[left](A)
        \tkzLabelPoints[right](B)
        \tkzLabelPoints[above](C)
    \end{scope}

    \begin{scope}[xshift=3.5cm, scale=1.6]
        \tkzDefPoints{0/0/A', 2/0/B', 1.5/1.3/C'}
        \tkzDrawPolygon(A',B',C')
        \tkzLabelPoints[left](A')
        \tkzLabelPoints[right](B')
        \tkzLabelPoints[above](C')
    \end{scope}

    \begin{scope}[xshift=8.2cm,scale=0.8]
        \tkzDefPoints{0/0/B'', 2/0/A'', 0.5/1.3/C''}
        \tkzDrawPolygon(A'',B'',C'')
        \tkzLabelPoints[right](A'')
        \tkzLabelPoints[left](B'')
        \tkzLabelPoints[above](C'')
    \end{scope}
\end{tikzpicture}

